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Re:Chasing the DAO Attacker’s Wake – A second exploit by jsprogrammer on Tuesday June 21, 2016 @01:18PM (#11947425)
I have asked if there is a contract simulator and I got no response.

Even though the coding experience seems pretty poor, it doesn't appear to be particularly dangerous as bad contracts can just be rolled back.

Re:Chasing the DAO Attacker’s Wake – A second exploit by bradscarleton on Tuesday June 21, 2016 @01:22PM (#11947468)
There is no contract simulator AFAIK, but you can deploy contracts to a test network or your own private test network. The benefit there being it's cheaper from a Gas perspective, and you don't pollute the main network.
Re:Chasing the DAO Attacker’s Wake – A second exploit by DennisP on Tuesday June 21, 2016 @01:25PM (#11947496)
Aside from running on a test chain there's the Mix IDE, which basically does have a simulator, and an actual debugger. So far it's kinda unstable and tends to crash, but I like it a lot anyway.